Prefer ert-with-temp-directory in tests

Prefer ert-with-temp-directory in tests

* test/lisp/dired-aux-tests.el (dired-test-bug30624):
* test/lisp/emacs-lisp/track-changes-tests.el
(track-changes-tests--random):
* test/src/buffer-tests.el (test-buffer-chars-modified-ticks):
* test/src/fileio-tests.el (fileio-tests--symlink-failure)
(fileio-tests--insert-file-interrupt)
(fileio-tests--circular-after-insert-file-functions): Prefer
ert-with-temp-directory to using make-temp-file directly.

(cherry picked from commit 03bc51349f19899812652a8335f5055f561494e2)